Nozzle valve



Feb. 20, 1951 J. E. HOLVECK ET AL NOZZLE VALVE 2 Sheets-Sheet 1 Filed April 6, 1946 JOSEPH E. HOLVECK ARTHUR G- R Q c K W00 0 INVENTORS Feb. 20, 1951 J. E. HOLVECK ET AL NOZZLE VALVE -2 Sheets-Sheet 2 Filed April 6, 1946 FIG-.2

JOSEPH E. HOLVECK ARTHUR G, RQCWOODINVENTORS Patented Feb. 20, 1951 NOZZLE VALVE Joseph E. Holveck, Upper Montclair, and Arthur G. Rockwood, Nutley, N. J assignors to Worthington Pump and Machinery Corporation, Harrison, N. J a corporation of Delaware Application April 6, 1946, Serial No. 660,048 4 claim (o1. 137 -139) This invention relates to nozzles, and more particularly tohigh pressure-high velocity nozzles such as are employed in removing bark from logs, descaling steel billets, steel sheets, and like cleaning uses.

An object of the present invention is to provide a nozzle for projecting jets of high pressurehigh velocity fluid, which nozzle combines in a single unitar structure, a control valve structure for controlling fluid flow through the nozzle, together with straight line flow of the fluid from the valve to the ejection opening of the nozzle.

Other objects of the present invention are to provide in a nozzle, as specified, means for operating the valve hydraulically by the same. pressure fluid which is delivered to the nozzle; means for preventing slamming of the valve upon its seat; the provision of a removable or replaceable orifice member which controls the opening or closing of the valve; and to provide a nozzle structure as specified which is positive in its action and may be delicately and accurately controlled to perform its desired function.

With these and other objects in view, as may appear from the accompanying specification, the invention consists of various features of construction and combination of parts, which will be first described in connection with the accompanying drawings, showing a nozzle of a preferred form embodying the invention, and the features forming the invention will be specifically pointed out in the claims.

In the drawings:

Figure 1 is a side elevation of the improved nozzle showing a longitudinal sectional view of a control valve structure for controlling operation of the nozzle:

Figure 2 is a longitudinal section through the nozzle; and

Figure 3 is a horizontal section taken on the line 3-3 of Figure 2.

Figure 4 is a horizontal section taken on the line 4--4 of Figure 2.

Figure 5 is a fragmentary longitudinal section through a modified form of the nozzle.

Referring more particularly to the drawings, the improved nozzle structure comprises a body or housing I which has an inlet port 2 for the inlet of high pressure fluid formed in one side thereof and which body or housing I is provided with a longitudinal bore 3 which receives therein the valve cage 4. The valve cage 4 has an annular shoulder 5 formed thereon which abuts the annular shoulder 6 formed in the housing I and also has an elongated externally screw threaded flow extension 1 formed on one end thereof. A clamp: ing nut 8 is threaded on the flow extension 1 and engages the end of the housing I for clamping the shoulder 5 tightly against the shoulder 6, and the valve cage 4 is prevented from turning rela: tive to the housing by a set screw 9.

As clearly shown in Figure 3 of the drawings the inlet port 2 opens'into an annular passage I i) in the housing I. The annular passage II! has communication with the interior of the valve cage 4 through a plurality of openings II formed in the valve cage. The openings II open into an enlarged chamber section I2 of the bore of the valve cage 4, which in turn has communication with the out flow passage I3 in the flow extension '5. A valve seat I4 is formed at the junction of the chamber I2 with the flow passage I3 and a valve I5 co-operates with the valve seat I4 for controlling flow of high pressure fluid through the flow passage I3 and outwardly through the nozzle tip IS. The nozzle tip I6 is provided with a flow passage forming bore I! of any desired shape to provide the desired shape and effect of the projected stream of high pressure fluid from the nozzle. The nozzle tip I6 is detachably'con nected to the flow extension I by a nut' I8, which has a tapered bore IQ for clamping engagement with the tapered outer surface'of the nozzle tip I6.

The high pressure fluid or water entering the chamber I2 through the ports or openings I I ma direction transverse of its flow direction through the flow passage I3, and from the annular space It] will have whirl components and will be in a turbulent state. A straightening vane 20 is located in the flow passage I3 to remove the whirl com ponents and turbulence from the flowingstream of high pressure fluid'and deliver the fluid in a straight line flow to the bore I! of the nozzle tip I6. The straightening vane 20 is preferably streamline in shape and extends longitudinally in the flow passage I3 approximately at its longitudinal center..

The valve I5 is connected, by a reduced stem H to a piston 22 which is mounted for reciprocat ing movement in the'valve cage 4, and the piston 22 has an enlarged head 23 which reciprocates in the bore 24 of the bonnet 25 of the housing I.

The valve cage 4 has an annular chamber 25 formed therein about the piston 22, and'this'annular chamber 25 has communicationwith the annularspace Ill to receive high pressure fluid therefrom through a plurality of ports 27,. Screens 28 extend over the ports 21 to prevent any foreign matter from entering the ports 21,

The piston 22 has an inverted T-shaped passage 29 therein the ends of the cross line of which communicate with the annular chamber 26 while the stem of the passage extends longitudinally through the piston 22 and enlarged head 23, and opens out through a reduced orifice in the head 23 into the bore 24 outwardly of the outer end of the enlarged head 23. The reduced orifice is shown in the drawings as formed in a removable plug 30. The removable plug 39 is provided so that it may be replaced when the orifice therein becomes worn, or to permit use of different sized orifices at the outlet of thepassage 29; Packing shown at 3| is positioned about the piston 22 and other packing shown at'3'2'is'placed about the enlarged head 23 to retard leakage of pressure fluid past the piston 22 andenlarged head 23. However to prevent any leakage fluid which may pass the packings 3| and 32 from interfering with the operation of' the structure bleed off passages 33 are provided in the bonnet zt and open outto atmosphere as clearly shown in Figure '2 of the drawings.

The bonnet 2'5 has a pipe 3 2 connected thereto and opening into the bore 2 1, which pipe 32 is connected to and opens into the housing 35 of a pressure operated valve structure 35. A pipe 3? also has communication with the interior of the valve housing 35 and opens to waste or atmosphere. A piston valve 38 within the housing 35 controls fluid flow through the valve structure 35 and thus controls the communication of pipes 34 and 31. The valve 38 is urged on its seat by a spring 33.- and it has a stem is attached thereto which extends out of the housing 32 and is engaged by the stem or rod 4| of a piston 42. The piston 32 reciprocates in a cylinder 43 and is operated by pressure fluid from any suitable source, which enters the cylinder 23 through the pipe 44 and moves the piston 22 to unseat the valve 38 to permit pressure fluid to bleed from the bore 24 of the bonnet 25, through the valve structure In operation, the valve i5 is operated by hydraulic pressure (1. e. the pressure of the water or fluid entering through the inlet 2) acting upon the piston 22 and enlarged piston head 23. It will be noted by reference to Figure 2 of the drawings that the piston 22 has a smaller area exposed to the action of the pressure fluid than the piston head 23 and a larger exposed area than the valve l5.

Constant pressure is maintained in the bore or cylinder in which the piston 22 reciprocates and in the chamber 12, since they are open to the inlet 2 and the source of pressure fluid supply (not shown) and are sealed oil from atmosphere by the packing 3 I.

Intermittent pressure is maintained in the bore or cylinder 25, by opening and closing of the valve 38. When the valve 28 is closed pressure fluid from the inlet 2 flows through the chamber 26, inverted T-shaped passage 29 and restricted orifice 3B and is maintained in the bore or cylinder 26. This pressure fluid acting upon the larger area of the piston head 23 overbalances the pressure acting upon the smaller area of the piston 22 and keeps the valve i5 upon its seat 14, preventing the flow of the pressure fluid through the nozzle 16.

When the valve 33 is opened, the pressure in the bore or cylinder 24 becomes considerably less than the pressure in the chamber i2, due to the restricted flow of the pressure fluid through the orifice 39 and the unrestricted flow of the pressure'fluid from the bore or cylinder 28 through piping 34 and valve structure 36 to atmosphere or waste. This differential pressure causes the unbalanced force on the piston 22 to open or unseat the valve i5 and allow the water or fluid under pressure to flow through passage [3 and nozzle Hi.

In Figure 5 of the drawings a modified-form of the nozzle is shown. 'The modification of the nozzle structure shown in this Figure 5, deals only with the structure of the nozzle flow passage member and valve cage, being in all other respects of the same construction and arrangement, and manner of operation as the form of the nozzle shown in Figures 1 to 4 of the drawings.

*Inthemod-ified form shown in Figure 5 the valve cage 50 which carries the valve seat l4 and valve l5 terminates within the body I and the flow passage carrying member 51, which serves the function of the threaded extension I of Figure 2, is separate from the valve cage and is detachably connectedto the body I by means of a flange 52' and" bolts '53-,"so*that-' it-may be re moved for replacement with 'a nozzle flow passage member eitherlonger or'shorter "depending upon the service in which the nozzle is employed. A gasket 54 is provided to form a fluid seal between the flow passage member 51 and the The outer end of the flow passage member 5| is externally screw threaded as shown at 55'to receive a clamping nut 56 for clamping the nozzle tip 57 against the end'of the flow passage member 5|. A turbulence straightening vane 58 is also located in the passage formed in the flow passage member SI and serves the same function as the vane 20 shown in Figures 2 and 4 of the drawings.

It will be understood that the invention is not to be limited to the specific construction or arrangement of parts shown, but that they may be widely modified within the invention defined by the claims.

What is claimed is:

1. In a nozzle structure, flow control means comprising, a valve body, a valve cage removably carried by said valve body and having a valve seat therein, said valve cage having an outflow passage therein, a-valve for contact with said valve seat a piston and an enlarged piston head connected to said valve, said valve body and valve cage having pressure fluid receiving chambers therein whereby one end of the valve stem will be subject to pressure fluid to force the valve into open position, said valve cage provided with an annular chamber therein and with ports connecting the annular chamber to said pressure receiving chamber in said valve housing, said piston and piston head provided with ports and passages to bleed pressure fluid from saidannular chamber through and behind said piston head to force said valve on its seat, said annular chamber and the ports into said bleed passage arranged whereby as said valve moves towards and onto its seat the portion of the valve cage adjacent said annular channel will act to throttle the flow of pressure fluid through said bleed passage but not completely close off communication of the passage with said annular chamber, said housing provided with a port to permit bleeding of pressure from behind said piston, and means to out ofi bleeding of pressure fluid from behind said piston to cause seating of said valve.

2. In a nozzle structure, flow control means comprising, a valve body, a valve cage removably carried by said valve body andhaving a valveseat therein, said valve cage having an outflow passage therein, a valve for contact with said valve seat, a piston and an enlarged piston head connected to said valve, said valve body and valve cage having pressure fluid receiving chambers therein whereby one end of the valve stem will be subject to pressure fiuid to force the valve into open position, said valve cage provided with an annular chamber therein and with ports connecting the annular chamber to said pressure receiving chamber in said valve housing, said piston and piston head provided with ports and passages to bleed pressure fluid from said annular chamber through and behind said piston head to force said valve on its seat, said annular chamber and the ports into said bleed passage arranged whereby as said valve moves towards and onto its seat the portion of the valve cage adiacent said an nular channel will act to throttle the flow of pressure fluid through said bleed passage but not completely close on communication of the passage With said annular chamber, said housing provided with a port to permit bleeding of pressure from behind said piston, means to out 01f bleeding of pressure fluid from behind said piston to cause seating of said valve, and a restricted orifice forming plug in said passage to restrict flow of pressure fluid therethrough.

3. In a nozzle structure, flow control means comprising, a valve body, a valve cage removably carried by said valve body and having a valve seat therein, said valve cage having an outflow passage therein, a valve for contact with said valve seat, a piston and an enlarged piston head connected to said valve, said valve body and valve cage having pressure fluid receiving chambers therein whereby one end of the valve stem will be subject to pressure fluid to force the valve into open position, said valve cage provided with an annular chamber therein and with ports connecting the annular chamber to said pressure receiving chamber in said valve housing, said piston and piston head provided with ports and passages to bleed pressure fluid from said annular chamber through and behind said piston head to force said valve on its seat, said annular chamber and ports into said bleed passage arranged whereby as said valve moves towards and onto its seat the portion of the valve cage adjacent said annular channel will act to throttle the flow of pressure fluid through said bleed passage but not completely close ofi communication of the passage with said annular chamber, said housing provided with a bleed-01f leakage port to prevent leakage of pressure fluid past said piston and piston head from disrupting the-pressure relation between the piston and pistonjhead.

4. In a nozzle structure, flow control means comprising, a valve body, a valve cage removably carried by said valve body and'having a valve seat therein, said valve cage having an outflow passage therein, a valve for contact with said valve seat, a piston and an enlarged piston head connected to said valve, said valve body and valve cage having pressure fluid receiving chambers therein whereby one end of the valve stem will be subject to pressure fluid to force the valve into open position, said valve cage" provided with an annular chamber therein and with ports connecting the annular chamber to said pressure receiving chamber in said valve housing, said piston and piston head provided with ports and passages to bleed pressure fluid from said annular chamber through and behind said piston head to force said valve on its seat, said annular chamber and the ports into said bleed passage arranged whereby as said valve moves towards and onto its seat the portion of the valve cage adjacent said annular channel will act to throttle the flow of pressure fluid through said bleed passage but not completely close off communication of the passage with said annular chamber, said housing provided With a bleed-off leakage port to prevent leakage of pressure fluid past said piston and piston head from disrupting the pressure relation between the piston and piston head, and a spring in said valve body and engaging said piston head to cooperate with pressure fluid act ing on the piston head to seat the valve.

JOSEPH E. HOLVECK. ARTHUR G. ROCKWOOD.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 477,824 Robinson June 28, 1892 597,842 Edmands Jan. 25, 1898 1,046,236 Wagner Dec. 3, 1912 1,147,639 Nolan July 20, 1915 1,203,607 Gladding Nov. '7, 1916 1,504,201 Anderson Aug. 12, 1924 1,677,781 Joyner July 17, 1928 2,329,001 Robinson Sept. 7, 1943 

